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User-Defined Types:

None.

Notes:

The documentation states that if using unbuffered IO, the memory must be "storage aligned" (aligned to the sector size of the storage device). Either this is not enforced, or managed allocations (specifically byte arrays) are automatically storage aligned because there seems to be no problem using it. Note that storage aligned and page aligned are not the same, and managed allocations are not in general page aligned (required for ReadFileScatter).

Notes:

Regarding the above note, my experience shows that failing to provide a storage-aligned buffer causes ReadFile to perform all IO synchronously. I.e. it always blocks until the operation is complete and never returns ERROR_IO_PENDING.

An IntPtr is a pointer to a memory location (unmanaged) that adapts to the platform it is running on (64-bit, etc.) UNLIKE a standard int/Integer. You should always use this type for unmanaged calls that require it, even though an int will appear to work on your development machine.

1/13/2008 11:00:13 AM - tsahi-62.219.227.88

An IntPtr is a pointer to a memory location (unmanaged) that adapts to the platform it is running on (64-bit, etc.) UNLIKE a standard int/Integer. You should always use this type for unmanaged calls that require it, even though an int will appear to work on your development machine.

1/13/2008 11:00:13 AM - tsahi-62.219.227.88

Click to read this page

3/31/2016 9:44:13 AM - -195.171.2.47

The WriteFileGather API

3/16/2007 1:59:07 PM - nathan@alphora.com-65.37.109.158

The ReadFileScatter API

3/16/2007 1:57:44 PM - nathan@alphora.com-65.37.109.158

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